H04M 3/546
In private branch exchanges
Official title: {in private branch exchanges}
H04M3/546 (In private branch exchanges) appears on 124 US grants and 70 published applications in this corpus.
Search patents in H04M- Granted patents
- 124
- Published applications
- 70
- Assignees
- 65
- Inventors
- 249
- Latest grant
- 4 Feb 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 4 | 0 |
| 1985 | 1 | 0 |
| 1986 | 2 | 0 |
| 1987 | 2 | 0 |
| 1988 | 4 | 0 |
| 1989 | 2 | 0 |
| 1990 | 3 | 0 |
| 1991 | 2 | 0 |
| 1992 | 2 | 0 |
| 1993 | 1 | 0 |
| 1994 | 3 | 0 |
| 1995 | 5 | 0 |
| 1996 | 3 | 0 |
| 1997 | 2 | 0 |
| 1998 | 5 | 0 |
| 1999 | 3 | 0 |
| 2000 | 3 | 0 |
| 2001 | 3 | 3 |
| 2002 | 5 | 4 |
| 2003 | 3 | 3 |
| 2004 | 0 | 8 |
| 2005 | 6 | 5 |
| 2006 | 3 | 4 |
| 2007 | 3 | 4 |
| 2008 | 0 | 4 |
| 2009 | 2 | 2 |
| 2010 | 1 | 2 |
| 2011 | 3 | 4 |
| 2012 | 0 | 2 |
| 2013 | 4 | 1 |
| 2014 | 7 | 5 |
| 2015 | 5 | 6 |
| 2016 | 4 | 4 |
| 2017 | 7 | 3 |
| 2018 | 3 | 1 |
| 2019 | 4 | 2 |
| 2020 | 4 | 1 |
| 2021 | 2 | 1 |
| 2022 | 1 | 0 |
| 2023 | 1 | 1 |
| 2024 | 2 | 0 |
| 2025 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- System, method, and apparatus for using alternative numbers for routing voice calls and short messages in a communications network4 Feb 2025US 12,219,460 B2Tango Networks, Inc.
- Visual interfaces for telephone calls23 Jan 2024US 11,882,243 B18x8, Inc.
- Intelligent call handling and routing based on numbering plan area code9 Jan 2024US 11,870,938 B18×8, Inc.
- System, method, and apparatus for using alternative numbers for routing voice calls and short messages in a communications network23 May 2023US 11,659,471 B2Tango Networks, Inc.
- Visual interfaces for telephone calls30 Aug 2022US 11,431,854 B18x8, Inc.
- System, method, and apparatus for using alternative numbers for routing voice calls and short messages in a communications network10 Aug 2023US 2023/0254757 A1Tango Networks, Inc.
- System, method, and apparatus for using alternative numbers for routing voice calls and short messages in a communications network11 Feb 2021US 2021/0045038 A1Tango Networks, Inc.
- Predictive service for smart routing21 May 2020US 2020/0162614 A1T-Mobile USA, Inc.
- Telecommunication system and method for flexible control of the telecommunication system using a switching command issued by an application to a platform5 Dec 2019US 2019/0373108 A1Unify GmbH & Co.KG
- Telecommunication system and method for flexible control of the telecommunication system using a switching command issued by an application to a platform16 May 2019US 2019/0149658 A1Unify GmbH & Co.KG
Most cited
By later US patents
- Method and apparatus for handling incoming telephone calls340US 5,276,731 ARolm Company · 1994
- Method and apparatus for providing a personal locator, access control and asset tracking service using an in-building telephone network317US 5,363,425 ANorthern Telecom Limited · 1994
- Automated call handling apparatus261US 5,023,868 AAT&T Bell Laboratories · 1991
- System and method for controlling telephone calls through a cross platform enabled internet browser232US 6,496,500 B2Alex Information Systems, Inc. · 2002
- Automatic routing of incoming telephone calls to a plurality of receiving devices based on caller identification211US 5,644,629 ASNI Innovation, Inc. · 1997